Air purifier



FIG. 1 is a top, front, right side perspective view of a first embodiment of the air purifier;

FIG. 2 is a front elevational view thereof

FIG. 3 is a back elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top, front, right side perspective view of a second embodiment of the air purifier;

FIG. 9 is a front elevational view thereof

FIG. 10 is a back elevational view thereof;

FIG. 11 is a left side elevational view thereof;

FIG. 12 is a right side elevational view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the air purifier that form no part of the claimed design. 

CLAIM The ornamental design for an air purifier, as shown and described. 